PHP code example of zrnik / php-attribute-reflection

1. Go to this page and download the library: Download zrnik/php-attribute-reflection library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

zrnik / php-attribute-reflection example snippets




namespace Zrnik\Example;

use ReflectionClass;
use RuntimeException;

enum CaseToSolve
{
    #[AttributeToFind('AnyParameter')]
    case FirstCase;

    #[AttributeToFind('DifferentParameter')]
    #[AnotherAttribute('WhateverIsHere')]
    case SecondCase;

    case ThirdCase;

    public function getParameter(): string
    {
        $reflection = new ReflectionClass(self::class);
        $caseReflection = $reflection->getReflectionConstant($this->name);

        if($caseReflection === false) {
            throw new RuntimeException('case not found');
        }

        foreach ($caseReflection->getAttributes() as $reflectionAttribute) {
            if ($reflectionAttribute->getName() === AttributeToFind::class) {
                /** @var AttributeToFind $attributeToFindInstance */
                $attributeToFindInstance = $reflectionAttribute->newInstance();
                return $attributeToFindInstance->customValue;
            }
        }

        throw new RuntimeException(
            sprintf(
                'attribute "%s" not found on "%s"!',
                AttributeToFind::class,
                $this->name
            )
        );
    }
}


CaseToSolve::FirstCase->getParameter(); // 'AnyParameter'
CaseToSolve::SecondCase->getParameter(); // 'DifferentParameter'
CaseToSolve::ThirdCase->getParameter(); // RuntimeException




namespace Zrnik\Example;

use Zrnik\AttributeReflection\AttributeReflection;
use Zrnik\AttributeReflection\AttributeReflectionException;

enum SolvedCase
{
    #[AttributeToFind('AnyParameter')]
    case FirstCase;

    #[AttributeToFind('DifferentParameter')]
    #[AnotherAttribute('WhateverIsHere')]
    case SecondCase;

    case ThirdCase;

    /**
     * @return string
     * @throws AttributeReflectionException
     */
    public function getParameter(): string
    {
       return AttributeReflection::getClassConstantAttribute(
           AttributeToFind::class,
           self::class,
           $this->name
       )->customValue;
    }
}


SolvedCase::FirstCase->getParameter(); // 'AnyParameter'
SolvedCase::SecondCase->getParameter(); // 'DifferentParameter'
SolvedCase::ThirdCase->getParameter(); // \Zrnik\AttributeReflection\AttributeReflectionException